US1170804A - Feed-regulator for concrete-mixing machines. - Google Patents

Description

1,170,804. I Patented Feb-8,1916.

. w. J. DUNHAML; I

FEED REGULATORFOR CONCRETE MIXING MACHINES.

APPLICATION FIL ED MAY'20,'I9I4.

Y2 SHEETSSHEET\I.

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w. 1, DUNH'AM. FEED REGULATOR FOR CONCRETE MIXING MACHINES.

APPLICATION FILED MAY 20, 1914. w

2'SHEETSSHEET 2.

Patented Feb. 8,1916.

UNITED STATES PATENT OFFICE. 1

;WILLIAM J. IbUNHAM, or J'OHNSTOWN, 'NEW, YORK.

FEED-REGULATOR rose concnnrn-mxmo MACHINES.

. To all whom it may concern Be it known that I, WILLIAM J. DUnHaM, a citizen of the United States of Amer ca, and resident of J ohnstown, in the county of Fulton and State of New York, havein vented certain new and useful Improvements in Feed-Regulators for Concrete-Mixing Machines, of which the following is a specification.

n This 1nvent1on relates to machines for mixing concrete and the like and has for its object the provision of novel means for delivering predetermined amounts of the ingredients of the composition to a mixer where the same. may be agitated and comingled, preparatory to moistening the same, means being also providedfor de1iver ing liquid to the interior of the mixer or agitator so that the composition in emerging from the mixer will be in condition for use. a

A further object of this invention is to provide means foreflt'ecting a positive feeding operation for the cement as well as the coarser particles of material employed in compositions of matter to be used for the 3 production of so called artificial'stone, plastic bricks and for other uses as in the laying of sidewalks, roadbeds, etc. 7 a

A further ob ect ofthis invention is to provide a mixing machine of the character indicated having novel means for confining the materials to the conveyers whereby the material is prevented from gaining access to the working parts of the mechanism and preventing loss, due to the escape of such 5 material. 7

or hoppers and particularly in the provision-- Specification of Letters Patent.

Application filed May 20, 1914. Serial No. 839,865.

Patented ab. 8, 1916.

of novel means for controlling the outlet opening for the cement, provision. being ,made fon. guarding against the so-called bolling of the cement, which is due to its characteristic flowing or running qualities.

In describing the invention in detail, reference will be had to the accompanying drawings forming part of this specification,

v wherein like characters denote corresponding parts in the several views and in which- Figure 1 illustrates a view in elevation of the machine with the truck or support thereof omitted; Fig. 2 illustrates a top lan view, omitting the hoppers; Fig. 3 ilustrates a vertical sectionalview of the hopper and conveyer; Fig. 4 illustrates-an end view showing the hopper in elevation; Fig.

5 illustrates a sectional view on the line.

5 5of Fig. 4;-and Fig. 6 illustrates a deta11 viiew of one of the doors for coarse materia In these drawings, I have shown a frame 15 which is adapted to be supported in trucks of any appropriate type or on skids, or the frame may be otherwise supported but as the particular feature of supporting or transporting it is immaterial, means are not here shown for that purpose. The said frame supports slings or yokes 16 and brackets 17, the latter of which constitute supports for the hopper 18, which hopper'is connected to the brackets '17 bythe angle irons 1,9. A conveyer bed 20 is supported to be located beneath the discharge and toextend in frontof the hopper and is divided into longitudinally disposed channels by the side flanges 21 and intermediately disposed rib 22. Between the rib 22 and one of the side flanges, there is a conveyer belt 23 and between the said rib and the opposite side flange is a conveyer belt 24. 'lhe distance between the rib and one of the side flanges is greater than the space between the said rib and the opposite side flange as it has been ascertained in practice that the conveyer belt 24: which is designed for-the purpose of carrying cement may be of less caveying sand, gravel or other coarser particles which are to be'used in the composition of ,pacity than the conveyer 24' utilized for conmatter; in fact, the formula in most instances requires two-thirds or approximately two-thirds of the coarser material and about one-third of the cement, therefore, the capacity of the conveyers need not be the same. Provision is furthermore made in this invention for delivering to the mixer a still coarser material such as crushed stone,

the last mentioned result being attained through the medium of a transversely disposed conveyer 25, leading from the hopper 26, and discharging into the chute 27 and the chute 27 is also in position to receive materials from the conveyer belts 23 and 24.

The hoppers have discharge openings which allow the material to be deposited on the conveyers and the said openings are guarded by slidingshutters-or doors 28, 29 and 30,

. the latter of which is used for controlling 2 0 the exit opening of the cement. In describing the hopper 18, it might be well to;say that it has a partition 31 therein'so that it is divided into two compartments to retain the gravel and cement in a separated state until it is delivered to the chute through the finding access to the under surface of the conveyer, guards 32 are providedand they are attached to theside flanges and the in termediate rib so that their edges overlie the upper surface of the conveyer-belts. In the construction of these guards, longitudinally disposed plates are utilized, the said plates having flanges 33 at their upper edges,

which are designed to overlie the upper edges of'the side flanges or the upper edge of the intermediaterib according to whether the said guards are applied to the side flanges or the rib. In other words, i the guards are interchangeable and may be, used on the side flanges or the rib. At certain points throughout the length of the guard, bosses orthickened portions 34 are formed, the same being apertured for the reception of the securing bolts 35 which bolts pass through the said apertures and through apertures formed in the side flangesor intermediate rib so that the guard is bound or secured to one of said members. As will be seen by 'of the conveyers is prevented.

The mixer 36 consists in part of a cylin- 1,17o,so4.

drical rumble having spirally arranged blades 37 of appropriate pitch and inclination to carry the material delivered to the mixer toward the rear end thereof where it. is discharged to any appropriate receptacle or support. I

As a means for rotating the mixer, 36, the same is provided with annular ribs 38 forming tracks which run on rollers .39 appropriately journaled and supported by the stirrups or slings 39 which are anchored on the sills or frame.

The mixer cylindrical member 36 has one ehd partially closed by an apertured disk 40 having a toothed periphery which teeth are engaged by the sprocket chain 41 driven which shaft is journaled in the yokes or stirrups 39.

The power shaft 44 is driven by any appropriate motor which may be placed within the casing 45, the particular type of motor being immaterial. The drive shaft 44 is provided with a pulley 46having a belt 47 which runs over a pulley 48 on the driven shaft 49. p The driven shaft 49 has a beveled gear wheel 50 which drives a beveled gear wheel 51 on the shaft 43 and the said shaft 43 has a clutch 53 for connecting, andd' connecting the sprocket'wheel 54 with the said shaft 43 so that the sprocket chain 55 may be driven to rotate the shaft56 through the medium of the sprocket'wheel 57. The shaft 56 has a drum or pulley 58 over which the conveyer belt 59 is run, the said conveyer and belt being in position to discharge material to the chuteleading tov the mixer. The bed forthe conveyer belt 59 is the same as the bed for the conveyers for the cement and gravel and the guard and other parts tioned conveyers and therefore, a further detailed description isbelieved unnecessary.

The driven shaft 49 has a sprocket wheel 60 with a sprocket chain 61 running over a sprocket wheel 62 which latter sprocket wheel is on a transversely disposed shaft 63 carrying two sprocket wheels 64 and 65, one of which is larger than the other. The shaft 63 is furthermore provided with a double clutch 66 which operate with clutch member 67 and 68 on the sprocket wheels 64 and respectively, so that the clutch members may be operated to cause either the wheel 64 or 65 to rotate under the influence of the shaft 63. A shaft 69 is journaled in appropriate brackets and it carries a drum or pulley 70 over which the conveyer belts 23 and 24 travel and by which they are moved. In order to rotate the shaft 69, sprocket wheels 70 and 71 are secured to it and they are engaged by chains 72 and 73 which are drivenby the sprocket from the sprocket wheel 42 on a shaft 43 wheels 64: and 65 respectively so that'by reason of the use of the clutch, the conveyer may be driven at an increased or diminished speed depending upon the wheel which is utilized for communicating power to the shaft 69.

The bearings 74 for the shaft 69 are adjustably mounted in the brackets 75 which brackets are supported as shown and by reason of the adjustability of the bearings, the conveyer belts may be tightened or adjusted to take up lost motion. The conveyer 23 and 24 are caused to run over an idler 76 which is rotatably mounted in the brackets 77.

The doors 28, 29 and 3) are'similarly operated by means of leversor handles 78 mounted on studs 79 and connected by links 80 with the appropriate doors so that motion of a handle or lever may be communicated to a door. The doors that are used for guarding the passage of coarse-material such as gravel or crushed stone are preferably joined near the lower end by a hinge such as shown in the drawing. A detailed-construction of one of the doors 28 will serve as an illustration of the construction of the door 29. The lower part of the door 28 has Q a hinged section 28 provided with astud 28 The upper section of the door has a stud 28 with a spring 28 between them which serves to hold the sections in alinement under normal conditions of operation but the spring is provided so that. the lower section may yield to prevent cloggingof the passage-way for the material should an unusually large piece of material travel in the chute and contact the lower portion of the door, as the said lower portion may be swung outwardly to allow the larger piece to 3 pass thereunder.

It has been found in practice by the use of the apparatus just described that the hopper doors may be set at predetermined positions to insure such regularity of feed of material from the hoppers as to enable the operator to determine the number of cubic feet ofmaterial which will be mixed ready for use.

For instance, if a formula calls for one third amount of material or supplies furnished for use in the machine.

It is well known that there are intermittent feeding devices designed to accomplish the result attained by this invention but the intermittent devices such as plungers disa conveyer bed having. side flanges and anv intermediate partition, conveyer belts run- Iiing between the side flanges and the intermediate partition, means for driving the conveyer belt, and guards secured to the side flanges and the intermediate partition for preventing material gaining access to theedges of the conveyer belts.

2. In a feed regulator for concrete mixing machines, the combination of a hopper,

a conveyer bed having side flanges and an intermediate partition, a conveyer belt between one of the side flanges and the'intermediate partition, a conveyer belt between the opposite side flange and the intermediate partition, means for driving the said belts, guards secured to the side flanges and intermediate partition, said guards having their edges terminating above the conveyer belts to prevent material gaining access thereto.

3. In a feed regulator for concrete mixing machines, the-combination of a hopper, a conveyer bed, and to one side of the longitudinal center of the hopper, side flanges and an intermediate partitionextending longitudinally of the said bed, conveyer belts on the bed, means for drivin the said conveyer belts, guards adapted to l e parallel with the side flanges and intermediate partition, said guard having. flanges at the upper edges overlying the sideflanges and intermediate partition, apertured bosses on the said guards, and means for securing the guards,

' ings at one end, a partition for separating the hopper into two compartments having discharge openings of. unequal area, a bed for the conveyer belts which is common to both compartments of the hopper, means for associating a conveyer bed with the hopper, and means within the hopper maintained to overlie the longitudinal edges of the conveyer belts.

5. In a feed regulator for concrete mixing machines, a hopper having a partition, the

lower end of which is separated longitu-' dinally, a rib maintainedto extend between the separated end ofthe partition, traveling conveyer belts, the side edges of which are In testimony whereof, I hereunto afiix my overlaid by the ends of the partition, designature in thevpresenoe of two witnesses. pending means for overlying the other edges LLIAM J. DUNHAM. of the belt, and a rigid bed associated with Witnesses:

the hopper and upon which the conveyer PEARL A. PUTNAM, travels. Lo'mm E. BARKLEY.

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